☣️ UN 1868 • CLASS 4
Decaborane
Placard: Flammable Solid. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 1868
Class: 4
Placard type: Flammable Solid
ERG: Guide 134 (check current ERG)
Isolation: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
Chemical & Response Details
| Also known as | Decaborane(14)Boron hydrideDecaboron tetradecahydrideBoron decahydride |
| CAS Number | 17702-41-9 |
| Appearance | White crystalline solid with a pungent, bitter odor. Exists as colorless to white crystals at room temperature. |
| Flash Point | 70C (158F) |
| Boiling Point | 213C (415F) |
| Vapor Density | 4.2 (heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water, producing hydrogen gas and boric acid. Avoid prolonged contact with water. |
| Extinguishing | Dry chemical, CO2, sand, or dry powder. Alcohol-resistant foam may be used. Water spray for cooling only. |
| PPE | ⚠️ Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption. |
| Isolation | ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated.
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1868 — Decaborane HAZMAT RADIO NOTE — UN 1868
Product: Decaborane
Class 4 / Flammable Solid / ERG 134
PPE: Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
ISOLATION: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 1868 — Decaborane
Class: 4 | Placard: Flammable Solid | ERG Guide: 134
Appearance: White crystalline solid with a pungent, bitter odor. Exists as colorless to white crystals at room temperature.
Water Reactivity: Hydrolyzes slowly in water, producing hydrogen gas and boric acid. Avoid prolonged contact with water.
Extinguishing: Dry chemical, CO2, sand, or dry powder. Alcohol-resistant foam may be used. Water spray for cooling only.
PPE: Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
Isolation: ERG 134: Initial isolation 50m in all directions. Protective action distance: large spill 150m downwind during day, 300m at night. Evacuate immediate area if fire involves this material.
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/1868 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1868 Decaborane Cls4 ERG134 | ERG 134: Initial isolation 50m in all directions. Protective action distance: la | allfirefighter.com/hazmat/un/1868SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/1868
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FAQ
Flammable/combustible material. May be ignited by heat, sparks or flames. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level B minimum with SCBA required. Full protective clothing including chemical-resistant suit. Highly toxic by inhalation and skin absorption.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 134 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.